<template>
<div class="header">
  <van-icon name="arrow-left" class="icon" @click="toBack"/>
  <div>{{ title }}</div>
  <div class="edit" v-if="edit" @click="editClick">
    {{store.state.edit ? "编辑" : "完成"}}
  </div>
</div>
</template>

<script>
import { Toast } from 'vant'
import { useRouter } from 'vue-router'
import { useStore } from 'vuex'
import emitter from '../common/js/evenbus'

export default{
  props: ["title","edit"],
  setup() {
    const router = useRouter()
    const store = useStore()
    const toBack = () => {
      router.back()
    } 

    // 编辑按钮
    function editClick(){
      if(store.state.cartList.length){
      store.commit("EDIT")
        emitter.emit("edit")
      } else {
        Toast.fail("购物车空空如也")      
      }
    }
    return {
      toBack,
      editClick,
      store,
    }
  }
}
</script>

<style lang="less" scoped>
.header{
  background-color: #fff;
  height: 40px;
  font-size: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid #d7d7d7;
  .edit{
  font-size: 16px;
  position: absolute;
  right: 15px;
  font-weight: normal;
  }
  .icon{
    position: absolute;
    left: 10px;
  }
}
</style>